296 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 10 



female but shorter. Length of body 1.64 mm. to 1.80 mm. Width (third abdominal 

 segment) .83 mm. to .90 mm. Cornicles .20 mm. Cauda .15 mm. to .17 mm. Beak 

 .40 mm. Antenme; III .25 mm. to .26 mm., IV .13 mm. to .14 mm., V .14 mm. to 

 .15 mm., VI .07 mm., filament of VI .26 mm. to .29 mm. 



Collected in curled foliage May 7, 1914. 



Male pupa. Brick red; wing-pads whitish. Taken May 7, 1914. 



Male (Fig. 16, 27, 28). General color red; head, thorax, cornicles, cauda, sterna» 

 black; antennae black, base of III light red; legs pale yellowish-red, knees broadly, 

 tarsi, apical half of tibiic, black; stigma and insertions of wing light green; veins 

 black, discoidals I and II narrowly clouded and thickened; eyes dark red: antennae 

 much longer than body, on obvious frontal tubercles; II obtusely toothed; filament 

 of VI longer than III; IV longer than V; sensoriation III 40 to 44 circular tuberculate 

 the whole length of joint, IV 10 to 12 dispersed throughout joint, V 8 to 14 (besides 

 apical) disposed as on IV, VI 1 to 2 besides apical group : cornicles imbricated, cylin- 

 drical: Cauda ensiform: beak reaches third coxa% pale, apex dusky: legs long and 

 narrow: abdomen red, with lateral brown spots and faint brown markings on disk: 

 whole body clothed with hairs, of which there are several rows. Length of body 

 1.32 mm. to 1.54 mm. Width (mesothorax) .58 mm. to .60 nam. Cornicles .18 mm. 

 to .19 mm. Cauda .16 mm. Expanse of wings 5.40 mm. Beak .49 mm. Antennae; 

 III .59 mm. to .64 mm., IV .30 mm. to .40 mm., V .27 mm. to .36 mm., VI .08 mm. 

 to .11 mm., filament of VI .63 mm. to .68 mm. 



Type: U. S. National Museum Catalogue, No. 20073. 



Taken in curled foliage May 20, 1913, and May 7. 1914. 



I have never located any winter eggs. The aphids are not to be 

 found after the month of May and so I conclude that the winter eggs 

 are deposited in this month and that they do not hatch until the spring 

 following. The stem mothers must hatch as early as February as I 

 have collected mature second generation individuals in the last week 

 of March. 



Explanation of Figure 16 



1-3. Vacuna dryophila (?). 1: Alate viviparous (?) female, head and antennae 

 2: Male. 3: Oviparous female, and last antennal joint (enlarged). 



4-8. Callipterinella annulata. 4 : Apterous viviparous female. 5 : Apterous ovipa- 

 rous female, antenna. 6-8: Male. 6: antenna. 7: wing. 8: cornicle. 



9-14. Aphis neo-mexicana var. pacifica. 9-11: Alate viviparous female. 9: 

 antenna. 10: cornicle. 11: cauda. 12-14: Apterous viviparous female. 12: an- 

 teima. 13: cornicle. 14: cauda. 



15-28. Myzus ribifolii. 15, 16: Stem mother. 15: antenna. 16: cornicle. 

 17-19: Apterous viviparous female. 17: head and antenna. 18: cornicle. 19: 

 Cauda. 20-22: Alate viviparous female. 20: antenna. 21: cornicle. 22: cauda. 

 23-26: Oviparous female. 23: antenna. 24: cornicle. 25: cauda. 26: hind tibia. 

 27, 28: Male. 27: antenna. 28: cornicle. 



